fix calendar again

backend/handlers/scheduling/exceptional-hours.go

@@ -142,8 +142,9 @@ func CreateExceptionalGroup(w http.ResponseWriter, r *http.Request) {
 	}
 
 	var parsedWeeks []time.Time
+	ukLocation, _ := time.LoadLocation("Europe/London")
 	for _, ws := range g.WeekStarts {
-		weekStart, err := time.Parse("2006-01-02", ws)
+		weekStart, err := time.ParseInLocation("2006-01-02", ws, ukLocation)
 		if err != nil {
 			http.Error(w, "invalid week_start format, expected YYYY-MM-DD", http.StatusBadRequest)
 			return
@@ -152,6 +153,8 @@ func CreateExceptionalGroup(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, "week_start must be a Monday", http.StatusBadRequest)
 			return
 		}
+		// Normalize to UK midnight
+		weekStart = time.Date(weekStart.Year(), weekStart.Month(), weekStart.Day(), 0, 0, 0, 0, ukLocation)
 		parsedWeeks = append(parsedWeeks, weekStart)
 	}
 
@@ -262,8 +265,9 @@ func UpdateExceptionalApplications(w http.ResponseWriter, r *http.Request) {
 
 	// Validate and parse weeks
 	var parsedWeeks []time.Time
+	ukLocation, _ := time.LoadLocation("Europe/London")
 	for _, ws := range req.WeekStarts {
-		weekStart, err := time.Parse("2006-01-02", ws)
+		weekStart, err := time.ParseInLocation("2006-01-02", ws, ukLocation)
 		if err != nil {
 			http.Error(w, "invalid week_start format, expected YYYY-MM-DD", http.StatusBadRequest)
 			return
@@ -272,6 +276,8 @@ func UpdateExceptionalApplications(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, "week_start must be a Monday", http.StatusBadRequest)
 			return
 		}
+		// Normalize to UK midnight
+		weekStart = time.Date(weekStart.Year(), weekStart.Month(), weekStart.Day(), 0, 0, 0, 0, ukLocation)
 		parsedWeeks = append(parsedWeeks, weekStart)
 	}